Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-05-30
2006-05-30
Keith, Jack (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
07054059
ABSTRACT:
Improved lumped Raman amplification systems are disclosed. A lumped Raman amplification structure provides optimized efficiency, low noise figure over a range of gain settings, and a high saturation threshold. Responsibility for amplifying different portions of the spectrum is divided among multiple stages. In one particular implementation, two outer stages amplify a first band and two inner stages amplify a second band. The two inner stages also apply a small amount of amplification to the first band. A modification improves noise figure in the second band by adding some amplification in the second band to the first stage.
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Castagnetti Roberta
Meli Fausto
Pastorelli Rosanna
Aka Chan LLP
Bolda Eric
Cisco Technoloy, Inc.
Keith Jack
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